/******************************************************************
 *
 * Copyright 2019 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ******************************************************************/

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdbool.h>

#include "chip/esp32_dport.h"
#include "periph_ctrl.h"


/* Static functions to return register address & mask for clk_en / rst of each peripheral */
static uint32_t get_clk_en_mask(periph_module_t periph);
static uint32_t get_rst_en_mask(periph_module_t periph);
static uint32_t get_clk_en_reg(periph_module_t periph);
static uint32_t get_rst_en_reg(periph_module_t periph);

void periph_module_enable(periph_module_t periph)
{
	DPORT_SET_PERI_REG_MASK(get_clk_en_reg(periph), get_clk_en_mask(periph));
	DPORT_CLEAR_PERI_REG_MASK(get_rst_en_reg(periph), get_rst_en_mask(periph));
}

void periph_module_disable(periph_module_t periph)
{
	DPORT_CLEAR_PERI_REG_MASK(get_clk_en_reg(periph), get_clk_en_mask(periph));
	DPORT_SET_PERI_REG_MASK(get_rst_en_reg(periph), get_rst_en_mask(periph));
}

void periph_module_reset(periph_module_t periph)
{
	DPORT_SET_PERI_REG_MASK(get_rst_en_reg(periph), get_rst_en_mask(periph));
	DPORT_CLEAR_PERI_REG_MASK(get_rst_en_reg(periph), get_rst_en_mask(periph));
}

static uint32_t get_clk_en_mask(periph_module_t periph)
{
	switch (periph) {
	case PERIPH_RMT_MODULE:
		return DPORT_RMT_CLK_EN;
	case PERIPH_LEDC_MODULE:
		return DPORT_LEDC_CLK_EN;
	case PERIPH_UART0_MODULE:
		return DPORT_UART_CLK_EN;
	case PERIPH_UART1_MODULE:
		return DPORT_UART1_CLK_EN;
	case PERIPH_UART2_MODULE:
		return DPORT_UART2_CLK_EN;
	case PERIPH_I2C0_MODULE:
		return DPORT_I2C_EXT0_CLK_EN;
	case PERIPH_I2C1_MODULE:
		return DPORT_I2C_EXT1_CLK_EN;
	case PERIPH_I2S0_MODULE:
		return DPORT_I2S0_CLK_EN;
	case PERIPH_I2S1_MODULE:
		return DPORT_I2S1_CLK_EN;
	case PERIPH_TIMG0_MODULE:
		return DPORT_TIMERGROUP_CLK_EN;
	case PERIPH_TIMG1_MODULE:
		return DPORT_TIMERGROUP1_CLK_EN;
	case PERIPH_PWM0_MODULE:
		return DPORT_PWM0_CLK_EN;
	case PERIPH_PWM1_MODULE:
		return DPORT_PWM1_CLK_EN;
	case PERIPH_PWM2_MODULE:
		return DPORT_PWM2_CLK_EN;
	case PERIPH_PWM3_MODULE:
		return DPORT_PWM3_CLK_EN;
	case PERIPH_UHCI0_MODULE:
		return DPORT_UHCI0_CLK_EN;
	case PERIPH_UHCI1_MODULE:
		return DPORT_UHCI1_CLK_EN;
	case PERIPH_PCNT_MODULE:
		return DPORT_PCNT_CLK_EN;
	case PERIPH_SPI_MODULE:
		return DPORT_SPI01_CLK_EN;
	case PERIPH_HSPI_MODULE:
		return DPORT_SPI2_CLK_EN;
	case PERIPH_VSPI_MODULE:
		return DPORT_SPI3_CLK_EN;
	case PERIPH_SPI_DMA_MODULE:
		return DPORT_SPI_DMA_CLK_EN;
	case PERIPH_SDMMC_MODULE:
		return DPORT_WIFI_CLK_SDIO_HOST_EN;
	case PERIPH_SDIO_SLAVE_MODULE:
		return DPORT_WIFI_CLK_SDIOSLAVE_EN;
	case PERIPH_CAN_MODULE:
		return DPORT_CAN_CLK_EN;
	case PERIPH_EMAC_MODULE:
		return DPORT_WIFI_CLK_EMAC_EN;
	case PERIPH_RNG_MODULE:
		return DPORT_WIFI_CLK_RNG_EN;
	case PERIPH_WIFI_MODULE:
		return DPORT_WIFI_CLK_WIFI_EN_M;
	case PERIPH_BT_MODULE:
		return DPORT_WIFI_CLK_BT_EN_M;
	case PERIPH_WIFI_BT_COMMON_MODULE:
		return DPORT_WIFI_CLK_WIFI_BT_COMMON_M;
	case PERIPH_BT_BASEBAND_MODULE:
		return DPORT_BT_BASEBAND_EN;
	case PERIPH_BT_LC_MODULE:
		return DPORT_BT_LC_EN;
	default:
		return 0;
	}
}

static uint32_t get_rst_en_mask(periph_module_t periph)
{
	switch (periph) {
	case PERIPH_RMT_MODULE:
		return DPORT_RMT_RST;
	case PERIPH_LEDC_MODULE:
		return DPORT_LEDC_RST;
	case PERIPH_UART0_MODULE:
		return DPORT_UART_RST;
	case PERIPH_UART1_MODULE:
		return DPORT_UART1_RST;
	case PERIPH_UART2_MODULE:
		return DPORT_UART2_RST;
	case PERIPH_I2C0_MODULE:
		return DPORT_I2C_EXT0_RST;
	case PERIPH_I2C1_MODULE:
		return DPORT_I2C_EXT1_RST;
	case PERIPH_I2S0_MODULE:
		return DPORT_I2S0_RST;
	case PERIPH_I2S1_MODULE:
		return DPORT_I2S1_RST;
	case PERIPH_TIMG0_MODULE:
		return DPORT_TIMERGROUP_RST;
	case PERIPH_TIMG1_MODULE:
		return DPORT_TIMERGROUP1_RST;
	case PERIPH_PWM0_MODULE:
		return DPORT_PWM0_RST;
	case PERIPH_PWM1_MODULE:
		return DPORT_PWM1_RST;
	case PERIPH_PWM2_MODULE:
		return DPORT_PWM2_RST;
	case PERIPH_PWM3_MODULE:
		return DPORT_PWM3_RST;
	case PERIPH_UHCI0_MODULE:
		return DPORT_UHCI0_RST;
	case PERIPH_UHCI1_MODULE:
		return DPORT_UHCI1_RST;
	case PERIPH_PCNT_MODULE:
		return DPORT_PCNT_RST;
	case PERIPH_SPI_MODULE:
		return DPORT_SPI01_RST;
	case PERIPH_HSPI_MODULE:
		return DPORT_SPI2_RST;
	case PERIPH_VSPI_MODULE:
		return DPORT_SPI3_RST;
	case PERIPH_SPI_DMA_MODULE:
		return DPORT_SPI_DMA_RST;
	case PERIPH_SDMMC_MODULE:
		return DPORT_SDIO_HOST_RST;
	case PERIPH_SDIO_SLAVE_MODULE:
		return DPORT_SDIO_RST;
	case PERIPH_CAN_MODULE:
		return DPORT_CAN_RST;
	case PERIPH_EMAC_MODULE:
		return DPORT_EMAC_RST;
	case PERIPH_WIFI_MODULE:
	case PERIPH_BT_MODULE:
	case PERIPH_WIFI_BT_COMMON_MODULE:
	case PERIPH_BT_BASEBAND_MODULE:
	case PERIPH_BT_LC_MODULE:
		return 0;
	default:
		return 0;
	}
}

static bool is_wifi_clk_peripheral(periph_module_t periph)
{
	/* A small subset of peripherals use WIFI_CLK_EN_REG and
	   CORE_RST_EN_REG for their clock & reset registers */
	switch (periph) {
	case PERIPH_SDMMC_MODULE:
	case PERIPH_SDIO_SLAVE_MODULE:
	case PERIPH_EMAC_MODULE:
	case PERIPH_RNG_MODULE:
	case PERIPH_WIFI_MODULE:
	case PERIPH_BT_MODULE:
	case PERIPH_WIFI_BT_COMMON_MODULE:
	case PERIPH_BT_BASEBAND_MODULE:
	case PERIPH_BT_LC_MODULE:
		return true;
	default:
		return false;
	}
}

static uint32_t get_clk_en_reg(periph_module_t periph)
{
	return is_wifi_clk_peripheral(periph) ? DPORT_WIFI_CLK_EN_REG : DPORT_PERIP_CLK_EN_REG;
}

static uint32_t get_rst_en_reg(periph_module_t periph)
{
	return is_wifi_clk_peripheral(periph) ? DPORT_CORE_RST_EN_REG : DPORT_PERIP_RST_EN_REG;
}
